The game is played normally, but at the end of the game (before the scoring) the players may score bonus points as follows:
The Biggest Area
Before dismantling the board, each player identifies the biggest area of their color. (Marbles placed diagonally are not considered connected).
The player who has the largest area of connected marbles scores bonus points equivalent to the difference between the number of marbles in the two players' largest areas.
Red zone: 12 marbles.
Black zone: 17 marbles.
17 -12= 5 bonus points. …